Or 
ON THE ACTION OF LIGHT UPON DYED COLOURS. 35 
Azo Colours. 
Wool Book XI. 
Direct Cotton 2, Columbia Green. Constitution not published. 
Colours. 
Crass III. Moperarrry Fasr Conours. (Woot.) 
Triphenylmethane Colours. 
Wool Book IX. 
Acid Colours. 6. Alkali Green. Sodium salt of diphenyl-diamido-triphenyl- 
carbinol-mono-sulphonic acid. §. and J. 271. 
53 7. Wool Green 8. Sodium salt of tetra-methyl-diamido-B-oxy- 
naphthyl-carbinol-di-sulphonic acid. 
8. MillingGreen. Sodium salt of tetra-methyl-dibenzyl-pseudo- 
rosaniline-disulphonic acid. 
Azo Colours. 
Wool Book X. 
Direct Cotton 1. Diamine Green B. From benzidine, j-nitro-benzene-azo- 
Colours. amido-naphthol-di-sulphonic acid, and phenol. 
Mordant Colours. 1. Azo Green (Cr). From m-amido-tetra-methy]-p-diamido- 
triphenyl-methane, and salicylic acid. S. and J. 273. 
Crass IV. Fast Cotours. (Woot.) 
Wool Book X. 
Direct Cotton 
Colours. 3. Benzo Olive. Constitution not published. 
Mordant Colour. 4. Diamond Green (Cr), Constitution not published. 
Crass V. Vury Fast Contours. (Woot.) 
Triphenylmethane Colours. 
Wool Book X. 
Mordant Colours. 3. Ccerulein (Cr). Product of the action of sulphuric acid on 
Gallein. §S. and J. 336. 
Oxyketone Colours. 
Mordant Colours. 5. Alizarin Green SW (Cr). Sodium bisulphite compounds of 
tri- and_tetra-oxyanthraquinone-quinoline-sulphonic acids. 
S. and J. 258. 
Quinoneoxime Colours. 
Mordant Colours. 6. Dark Green (Fe). Di-quinoyl-dioxime. §. and J. 232. 
e 7. Gambine Y (Fe). f§-naphtho-quinone-a-oxime. §. and J. 
234, : 
- 8. Gambine B (Fe). Constitution not published. 
x 9. Naphthol Green B (Fe). Ferrous sodium salt of nitroso-B- 
naphthol-8-mono-sulphonic acid. S. and J. 236. 
3 10. Dioxine (Fe). 8-oxy-naphtho-quinone-oxime. §. and J. 235. 
‘i 11. Gambine R (Fe). Naphtho-quinone-oxime. §. and J. 233. 
Norrs.—The great fastness of the quinone-oxime colours when fixed 
with iron mordant is worthy of special notice. The fastness of Ccrulein 
green as a Triphenylmethane Colour is also remarkable, but although 
Ceerulein is usually classed as a Triphenylmethane Colour, its constitution 
when fully determined may cause it to be more properly placed in some 
other class. 
Sirk Parrerns. 
Most of the foregoing colours were also dyed on silk, and the patterns 
were exposed to light along with those on wool. The relative fastness of 
the various colours was, for the most part, the same as on wool, the 
AAQ 
